Hey Doug,
I tried all sorts of things... even things that seemed rather backwards. I tried a variety of disk count's, chunk sizes, IO sizes, IO Counts, etc.
Yes...the changes were adding the bi_iter (mostly).
I also eliminated the limit of 10 printk's so that I could try various MDRaid configurations and various block size and counts without having to reboot.
I would have thought that the OS would pass the IO from user space to the driver without modification. But it appears that's not the case.
Bob Kierski
Senior Storage Performance Engineer
Cray Inc.
380 Jackson Street
Suite 210
St. Paul, MN 55101
Tele: 651-967-9590
Fax: 651-605-9001
Cell: 651-890-7461
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